9.2.1 Scale Drawings, PT3 Focus Practice

Question 1:
Diagram below shows polygon P drawn on a grid of equal squares with sides of 1 unit.
On the grid in the answer space, redraw polygon P using the scale
1:12.
The grid has equal squares with sides of 1 unit.

Answer:

Question 2:
Diagram below shows polygon W drawn on a grid of equal squares with sides of 1 unit.
On the grid in the answer space, redraw polygon W using the scale 1 : 2.
The grid has equal squares with sides of 1 unit.

Answer:

Question 3:
Diagram below shows a polygon PQRSTU.

(a) If the polygon is redrawn using the scale 1 : 400, calculate the length of PQ.
(b) In the answer space, redraw the polygon using the scale 1 : 400. The grid has equal squares with sides of 1 cm.

Answer:
(a)

Length of PQ=4800 cm400=12 cm

(b)

Question 4:
Diagram below shows a polygon.

On the grid in the answer space, redraw the polygon using the scale 1 : 500. The grid has equal squares with sides of 1 cm.

Answer:

Actual length

Drawing

45 m = 4500 cm

4500 ÷ 500 = 9 cm

20 m = 2000 cm

2000 ÷ 500 = 4 cm

35 m = 3500 cm

3500 ÷ 500 = 7 cm

10 m = 1000 cm

1000 ÷ 500 = 2 cm

Question 5:
Diagram below shows a polygon.

(a) If the polygon is redrawn using the scale 1 : 300, calculate the length, in cm, the drawing for the side 24 m.
(b) In the answer space, redraw the polygon using the scale 1 : 300. The grid has equal squares with sides of 1 cm.